Automatic telegraph receiving machine



' Sept. 13, 1938. Y WATANABE AU' IOMATIC TELEGRAPH RECEIVING MACHINE Filed May 22, 1935 4 SheetS -Sheet 1 1 INVEN TOR.

Va 514/ 70 Wqigvwggg a ah A TTORNEYS.

Sept. 13, 1938. Y, WATANABE 2,130,166

I AUTOMATIC TELEGRAPB RECEIVING MACHINE I Filed May 22, 1935 4 Sheets-Sheet 2 INVENTOR. VOSH/TO WA Tfl/V/QBE BY. wa

ATTORNEYS.

Sept. 13, 1938. Y. WATANABE 2,130,166

AUTOMATIC TELEGRAPH RECEIVING MACHINE Filed May 22, 195i 4 Sheets-Sheet 3 A TTORNEYS.

.Sept. 13, 1938.' Y, WATANABE $130,166

AUTOMATIC TELEGRAPH RECEIVING MACHINE Filed May 22, 1955 4 Sheets-Sheet 4 HNOI-IHNHHH GNG O I- INVENTOR. Yes 4/ T0 W4 734N965 lax w g A TTORNEYS.

Patented Sept. 13, 1938 UNITED STATES AUTOMATIC TELEGRAPH RECEIVING MACHINE Yoshito Watanabe, Suma-ku, Kobe, Japan A Application May 22, 1935, Serial No. 22,673

In Japan June 20, 1934 1 Claim.

The present invention relates to telegraph receiving systems and particularly to an apparatus by which an alarm or a signal will be automatically given in response to prearranged codes of dots, dash and interletter space impulses.

This application is a continuation in part of my copending application Serial No. 2,157 filed January 17, 1935, corresponding to British Patent 436,423. In the aforementioned application is described in substance a receiving apparatus and a selector device for closing a circuit in response to different prearranged codes of dots, dashes and interletter spaces comprising a stationary frame and a rotatable squirrel-cage type controller having studs spaced along its periphery. A contact roller is mounted on each stud and is slidable longitudinally thereof, and selecting means are so positioned that it will cause the roller which will normally enter the dot passageway, to enter either the dash or interletter space passageway. Upon receipt of a dot, dash or interletter space impulse, the controller is moved the space of one stud and is presented to the selecting means. Means responsive to a dash im- 5 pulse causes the selecting means to move the then presented roller into the dash position and separate means responsive toan interletter space impulse causes the selecting means to move the roller into the interletter space position.

30 The object of thepresent invention is to provide an economical and efiicient apparatus of the type described in which the squirrel-cage type controller is reduced in size.

Another object is to eliminate unnecessary rotation of the controller and reduce the number of studs required which will result in increased reception speed of the messages.

These objects may be accomplished by bringing separate sets of contact rollers arranged in 40 two rows on the studs and actuated respectively by means responsive to the receipt of dot and dash impulses and by means responsive to the receipt of the interletter space impulses. Separate means responsive only to dot and dash im- 45 pulses are provided to cause the controller to rotate one step forward. Thus, the controller will remain stationary upon the receipt of an The interletter reinterletter space impulse. eponsive means however, will in this instance 50 cause the selecting means to move the corresponding roller into interletter space position. Referring to the accompanying drawings, Figure 1 is a front view of an automatic telegraph receiving apparatus according to the pres- 55 cut invention;

Figure 2, a plan of the same with some of the studs removed;

Figure 3, a development showing an example of the arrangement of the essential parts;

Figure 4, a partial section along the line 44 5 of Figure 3;

Figure 5, a partial section along the line 5-5 of Figure 3;

Figure 6 is a front section of a rotating member along the line 6-6 of Figure 7;

Figure 7, a sectional side view of the rotating member;v

Figures 8, 9 and 10 show'the manner of transforming electric dot and dash impulses, the manner of arranging the corresponding rollers of 15 the rotating member, the manner of arranging the contact points of the fixed member, and also their electric connection;

Figure 11 is a diagram of an electric circuit showing the whole system, 20

Figures 12 to 20 are examples showing the order of the selection and forward movement of the rollers; v

Figure 21 shows an arrangement of a group of contact points for several different signals and 25 Figure 22 shows the number of the contact points insulated from one another corresponding to several signals shown in Figure 21 and to be arranged in each section.

Referring to-Figs. 6 and 7, a rotatable member I is made by providing studs 3 horizontally at certain intervals between side plates I to form a squirrel cage with its shaft 2 in the center, dividing the studs by means of flanges 4 attached to their middle portions and inserting contact point closing rollers B, B into each stud separately at the right and left. As shown in Fig. 4, studs 3 may be tightened by screwing nuts n upon their ends connected with the side plates I. A rotatable shaft 2 is passed through a frame 40 5 between the side plates I and connected with the latter by means of a suitable nut n as shown in Fig. 7. Then, said frame 5 is secured to-said shaft 2 and the shaft 2 of the rotatable member I is rotatably mounted upon a portion I of a fixed member 6 of drum type, (see Figs. 1 and 2) and provided at its one end with a ratchet wheel W fixed thereto by means ,of nuts 12".

The fixed memberfi is pierced with several series of apertures into which contact points 50 5| are screwed, said contact points consisting of the combination of elastic contact pieces 5| at the periphery of a side frame 6 fixed to the surface of the base, the movable onesv of said contact pieces having legs 52' adapted for 'press- 55 2 ing and closing the contact points when a roller B or B meets the shoes 52 of the legs 52' as somewhat inclined toward the central line so rotation of the member that they are able to guide a series of rollers which is the normal track, the stud, a part |2 of each being attached to the to a certain position, near the flange 4 on roller-adjusting plate fixed member 6.

-A pair of roller-selecting devices, as shown in Figs. 1 and 2, has toothed wheels l3, I3, ratchets l4, l4 and roller rubber brakes l8, l8, one set of which is clearly shown in Fig. 5. Each set of the toothed wheels and ratchets is fitted to supporting plates l5 and I6 attached to the fixed frame 5, the toothed wheels l3 and I3 being engaged by the rollers B and B in the normal row respectively, while the ratchet H or I4 is interlocked with the end of a pawl 23 or 23' pivoted at its end to the inner end of a swinging lever m or s respectively (Fig. 2). The swinging lever m or s is pivoted at its outer end to a pivot 3| or 3| and also connected the ends of push rod 41 or 41' which is attached to the armature 48 or 48 of an electro-magnet E or F, so that when said electro-magnet E or F operates, it attracts the armature 48 or 48 against the force of an elastic plate 45 and spring P or 45 and P and moves the swinging levers m or s about the pivot 3| or 3| and causes the pawl 23 or 23' to push the ratchet l4 or I4 50 as to move the roller B or B to the right or left along the stud 3. V

For conveniences sake a letter space" selecting device is disposed under a dash mark selecting device. The rollers B and B are used for marks corresponding to dot and dash, and letter space according to Morse code respectively. In Figs. 1 and 3, 24 is a rubber roller serving as a brake and mounted upon one end of a lever 25 which is pivoted at its other end 26 (Fig. 1). A spring 21 presses against the lever 25, thus causing the roller 24 to be inserted between two studs 3 of the rotatable member I, so that when the member I is rotated, the roller 24 is inserted successively between adjacent pairs of studs 3, thus preventing the member I from turning too far and assuring a step by step The roller I8 shown in Figures 2 and 5 serves as toothed wheel l3 and is mounted upon one end of a lever IS. The opposite end of the lever I9 is pivotally mounted in a block carried by the frame 22 which is attached to the fixed member 6. A spring 2|, one end of which is fixed to the frame 22 presses against the lever |9 so that the roller l3 between two adjacent teeth of the toothed wheel I3. Consequently, when the wheel I3 is driven along with the ratchet |4 by means of the pawl 23, the roller l8 prevents the wheel |3 from moving too far and causes it to carry out a step by step motion. A similar device is provided for the toothed wheel l3, which engages the roller B. The roller l8 and the lever IQ of this device are indicated in Figures 1 and 2. In Figs. 1 and 2, 33 is a swinging lever adapted to be pushed in Fig. 8, denoted by at 49 or 49' witha brake for the carried by the lever I9 is inserted and moved by the armature 10 of an electric magnet D and has one end fixed by a pivot 44 and is controlled by an elastic member 43, sa i i lever 33 being connected at "H with a rod I2 attached to the armature I drawn by an elastic plate 13. 32 is a push lever connected with the lever 33 at one end 34 and guided by a member 38 and wheel 31. A pawl 35 which is adjacent to one end of the lever 32 is pressed by an elastic member 36 to mesh with the ratchet W.

In order to prevent the rotation of the rotatable body to the extent of more than one sec-- tion at a time by inertia, the push lever 32 has secured thereto a member 39 which faces the ratchet W and has a shoulder 40, and an elastic piece 42 having a wedge 4| at its end, so that when said lever 32 operates and pushes the ratchet W with the pawl 35, the wedge 4| is held between one of the teeth of the ratchet W and the shoulder 40 of the member 39 and thus the ratchet is braked.

In this invention, with regard to the elements of a telegraphic signal according to the Morse code, the dot and dash marks are, as shown the positions of the roller B at the left and right sides of a line P respectively; the letter space indicated by the position of roller B at the left side of the line Q and thus when any telegraphic signal is received, the arrangement of the selected rollers B and B of the rotatable member is brought into agreement with said received signalling marks. As between signal letters there is the time space, namely the "letter space", there is no possibility of confusion or mistake occurring if a letter space mark is shifted to the same row as the first mark of the following letter as shown by a dotted circle and therefore the forward movement of the rotatable member is omitted in case of letter space or in case of the end of the signal. Figure 9 shows the arrangement of rollers for a signal corresponding to that shown in Figure 8, in whichhowever the rollers at the right side of, the line Q Have no significance. If a group of contact points as shown in Fig. 4 is arranged as shown in Figure at the fixed member 6 and connected together, each roller of the rotatable member presses and closes each contact point of the fixed member at the end of a signal, thus completing an electric circuit.

Figs. 12 to 20 show the order of the arrangement and formation of a group of rollers according to a signal corresponding to the letters A and B, namely and As the period from the end of one signal until the beginning of the next one is essentially equivalent to a letter space", No. roller of B group next to the selecting line Z is selected in the left row as shown in Fig. 13 upon thearrival of the first dot mark of the signal A. (These operations will be understood by referring to the explanation to follow with regard to the electric circuit shown in Fig. 11.) -Then, upon the arrival of the next dash mark they move one more section forward, after which No. 2 roller of B group is selected to the right through a dotted position as shown in Fig. 14, and at the next letter space time No. 3 roller of B group underneath the selecting line Z is selected to the left (see Fig. and moved one section forward as shown in Fig. 16 by a das mark to select No. 3 roller of B group to the right. Then, bythree dot marks it moves forward three times successively, while the rollers Nos. 4, 5 and 6 ofv B.g roup remain in the normal position (see Figs. 1'7, 18 and 19) and finally No. 1' roller of B group is selected to the left by the next letter space as shown in Fig. 20.

As several contact points may be provided in a single system, it is possible to provide groups of contact points corresponding to several different signals. For example, when four signals S O S, A B C, M M and T T T are to be received, the connection of the contact points in each case is as shown in Fig. 21, and if these connections are brought into agreement with one another at the end, the number of the desired contact points in each section will be as shown in Fig. 22, and the four contact points corresponding to the last letter space may be substituted by a common contact point ta, which for conveniences sake may be provided at the armature of an electric magnet F as shown in Fig. 2. Since the last mark may be combined into dot and. dash" marks, these may be substituted, for instance, by contact point tn and 1512 respectively. Also for conveniences' sake these contact points tn and tm are transferred to other positions and changed into a switching mechanism of single pole double throw type, the

central contact member of. which is connected with the contact point ts as shown in Fig. 10.

As mentioned above, it is preferable that the several contact points corresponding to the last letter space" and the last signalling marks such as dot and dash" of any received signal are not arranged at the fixed member and substituted by the contacts ts and tn, tn of the relays F and G respectively, due to the provision of the toothed wheels I3 and I3 at the front and rear positions of the selecting line Z so that the setting of said contact pieces on the fixed member to be closed by the rollers is diflicult.

Consequently, unlike-the other contact points,

" the common contact point it cannot be set on the fixed member 6, since the selective wheel l3 stands in its way. Therefore, the common contact point to is situated in a position, shown in Fig. 2, in which it may be closed by a lever S which is operated by the attraction of the arma- -ture 46 of the electro-magnet F. For the same reason it is not possible to actuate the contacts tn and in directly by the roller B; these contacts are, therefore,'so located that they can be actuated along with the contact tlO by the electromagnet G (Figs. 2 and 11).

In the across-the-line-wiring diagram of Figure 11, R is a. relay connected with a receiving circuit L. C1, C2, C3, and C4 are relays for interpreting the signalling marks. The relay C1 is provided with a normally closing and instantaneously opening contact to, an instantaneously closing contact t1, and a slowly closing contact t2, the relays C2, C3, and C4 having instantaneously closing contacts ta, t4, and t5.

When the relay R is operated to close its contact 1- upon arrival of a signalling mark according to either a dot or a dash? mark of the Morse code, it completes the circuit of the relay C1 including a battery d, the lines 60, 6| and 62, the contact 1', the line 63, thecoil of C1, and the lines 64, 85, and 66. Then the contact ti of the relay C1 is closed instantaneously and energizes the coil of the relay D in the circuit including the battery (1', the lines 68, 6|, and 61, the contact $1, the line 68, the coil of relay D, and the lines 69, 65 and 66. Thus, the ratchet W is rotated to the extent of one tooth by the push .lever 32 and moves each series of roller groups B and B on the rotatable member one section forward. As the contact is of the relay E is normally kept closed, the circuit of a relay H is completed to separate its contact t9 by the closed contact t1, said complete circuit consisting of the battery (1', the lines 60, BI, and 61, the closed contact t1, the lines 68 and 1|], the coil of H, the line 1|, the contact to, and the lines 12, 65 and 66.

Now, if the received signalling element is a dot mark, the relay C1 closes its instantaneous contact 221 only, but not the slowly acting contact t2. However, if the received signalling element is a dash mark, the slowly acting contact tz will be closed after the closing of the instantaneously acting contact t1 to, operate the relay C2, the circuit of which is constituted by the battery d, the lines 66, 65, and 13, the closed contact t2, the line 14, the coil of C2, and the line 15. Then, the contact is of the relay C2 is closed to complete the circuit of the relay E including the battery d, the lines 60, 6| and 16, the closed contact t3, the line 11, the coil of E, and the lines 18, 65, and 66. Thus, the relay E is operated to attract the lever m, and the roller of the B group at the selecting line is selected to the right position by the toothed wheel l3 of the selecting device.

, At the same time, the contact is of the relay E connected to the relay H is opened and the relay H is reset to reclose its contact is, while a current is transmitted to the relay G by the closed contact t7 of the relay E, which completes the circuit including the battery d, the lines 60, 6|, and 19, the contact to, the line 80, the coil of G, the line 8|, the closed contact t1, and the lines 82, 65, and 66, so that the relay G is operated to open a dot" markj contact tn, which is normally closed, and to close a dash mark contact 7312, the energization of said relay G after it has once been energized being maintained by its holding circuit, which includes the battery d, the lines 60, 6|, and 19, the contact t the line 80, the coil of G, the line 83, the closed contact tin, and the lines 84, 85, 65 and 66.

At the end of a dash mark, the relays C1 and C2 are de-energized by the separated contact r of'the relay R to open the contacts'tn t2, and ta, and reset the relays D and E, while the relay G is held in operation through said holding circuit. Since the normally closed contact to of 'the relay C1 is closed again due to its resetting, the relay C: is energized by the battery d through the lines 66, 6|, and 86, the coil of C3, the lines 81 and 88, the contact 'to, the lines 13, 65, and 66, thereby closing its contact t4. Then, the circuit of the relay C4 is completed, said circuit including the battery d, the lines 60, 6|, and 89, the coil of C4, the line 90, the contact t4, the line 88,-the contact to, and the lines 13, 65, and 66. Then the slow operating relay C4 is energized and closes its contact is, thereby completing 'the circuit of the slow operating relay F;

which includes the battery d, the lines .60, 6|,

and 9|, the contact ts, the line 92, the coil of F,

and the lines 84, 85, 65, and 66, and operating said relay. Then, in a section following the selecting line Z, a letter space roller B is selected to one side-and also a contact ta is closed. It will be seen that this closed contact ta connected with the line 93 is connected with either a pair of contact groups KrKz and alarms AiAz or K3K4 and A3A4 tln'ough the contact tn and the line 9:}. or the contact tn and the line 85. Upon the arrival of a signalling mark after a letter space", the relay C1 is operated, which of the contact points of signals having operates the relay H and opens its contact t9. Therefore, even when the relay G has been kept in operation up to this time, its current is cut off once to reset the contact of a "dot mark contact tn.

K1 and K2 in Fig. 21 show the arrangements dash" for the last marks like T T T or and "MM or K1 and K4 show the arangements of the contact points of signals ending with -dot" marks like A B C or and S O S" or In this case, K1 and K2, and K3 and K4 are connected to a common dash mark contact point in and a common dot mark contact point tn respectively. Then, at the end of a signal the contact point tn or tn will be closed to complete an electric circuit and operate one of alarming members A1, A2, A3 and A4. In Fig. 11, r is a'resistance, Pz a controlling spring and d a storage battery. In Fig. 2, g is a rubber clasp and 12' are push levers secured to the armatures 10' of electric magnets H, G and having caps H screwedto their ends so as to be able to regulate their length and also inserted in bearings 46. 13 are elastic members with armatures 10 attached thereto.

According to the present invention, the rows of the contact point selecting rollers are divided into two kinds B and B for use as mark and letter space respectively. The ."mark rollers, namely a series of B group rollers are selected in case of "dash marks only, and letter space rollers, namely B group rollers are selected in case of the letter space and at the end of a signal respectively. In case of a dot mark, all of them-are moved one section forward. is to say, in case of letter space the rotatable member is not moved forward. Accordingly, the number of the rows of the rollers for a receiving signal is minimized to reduce the size of the rotatable member and also the operating time at letter space is reduced. Thus, it is possible to receive a high speed signal securely.

In accordance with the present invention, the contact pieces 5! are arranged one over the other at the periphery of the fixed member 6, this. arrangement being adapted for receiving signals such as T T T", M M, A B C and S O S, and the contact points of each of the groups K1, K2, K3 and K4 are connected in series, one end of each of the groups K1 and Kzbeing connected to the contact tn of the .magnetG, as shown in Fig. 11, and the other end to the alarms A1 and A: respectively, while one end of each of the groups K3 and tact tn of the magnet G and the other end to the alarms A3 and A4 respectively. When this That K4 is connected to the conmachine receives the signal A B C, it operates the different electro-magnets selectively by means of signalling marks representing said signal as explained before to bring the arrangement of the rollers B, B into the position indicated in Figure 9, so that only K3 of the groups K1, m, K3 and K4 is connecmd in series. On this occasion, the contacts tn and is of the magnets G and F are closed and a circuit consisting of the battery d, contacts is and tn, contact group K3, and alarm A3 is completed to operate the alarm A3. Similarly, upon arrival of the signal T T T",.the alarm A is operated, or if the signal is M M, the alarm A2 is operated. In this way, each alarm is operated selectively.

I claim:

A selector device for closing a circuit in response to prearranged codes of dot, dash and interletter space impulses comprising a frame, a rotatable squirrel-cage type controller mounted for rotation in said frame and having studs fixed thereto, said studs being equally spaced at the periphery of said controller, each having a flange and a contact roller mounted thereon and slidable longitudinally thereof on each side of said flange, partitions fixed to said frame adjacent to the path of movement of said studs and forming passageways having entrances for said rollers on each side of said flange and corresponding to an interletter space, to spacing between impulses of the same letter, to a dot and to a dash, respectively, means for normally causing the rollers on one side of the flange to be positioned to enter the dot passageway and the rollers on the other side to enter the passageway corresponding to spaces between impulses of the same letter, selecting means positioned at the entrance of the passageways for moving the positioned rollers to cause the dot and dash rollers to enter the dash passageway and the interletter space rollers to enter the interletter space passageway, means responsive to the receipt of a dot or a dash impulse to move the controller the space from one stud to the next to successively present the rollers to the selecting means, means responsive to a dash impulse to cause the selecting means to move the selected roller into the dash passageway, means responsive to the receipt of an interletter space impulse for causing the selecting means to move the then presented space roller to interletter space position, contact members mounted on said frame to be engaged by said rollers, said contact members being arranged in accordance with the code to which the selector is to respond, and a circuit including in series all of said contact members.

YOSHITO WATAN ABE. 

